Same here Andy. I'd whittled my list down to CAAD, Defy and F85. They were all great, but the F was the sharpest ride by a decent margin.
Having made that decision I then started scouting around for the best price and that's when I discovered
Wiggle doing the outgoing 2014 model for £540, reduced from £800. They're now selling the last few at a miserly£499, barely half price for some lucky punter. I think that because it's more of a niche brand they tend to get overlooked more than the main players,now retailers discount them all the more heavily to clear unsold stock.
Couldn't believe my luck!
And then, after some negotiation, Wiggle also threw in a £60 FSA seat post as the bike was was mis described on their website (they had mixed up the spec a bit with 75 which has a carbon post and 105).